KR20210053720A - Radiation-resistant silicone elastomer insulating wire coating composition having a light shielding layer - Google Patents

Abstract

The present invention is to apply a heat-dissipating silicone elastomer comprising metal-coated chopped yarn treated with a silane surface-treated tracking agent and an adhesion-improving agent to a silicone elastomer compound to coat an insulated wire. The present invention relates to a method for producing an insulating coated wire, and to an insulating coated wire with improved properties of heat dissipation, insulation, flame resistance, and light weight produced by the method. The method comprises: a first step of manufacturing a heat-dissipating silicone elastomer compound; a second step of manufacturing an insulated wire by forming an insulating layer on the outer periphery of a conductor coated with the adhesion improving agent; a third step of forming a lightweight shielding layer by braiding metal fiber yarn on the outer periphery of the insulated wire; and a fourth step of forming a coating layer made of a heat-dissipating silicone elastic body on the outer periphery of the lightweight shielding layer.

Description

Composition for coating heat-resistant silicon elastomer insulating wire coating composition having a light shielding layer

The present invention is to apply a heat-dissipating silicone elastomer comprising a silane-surface-treated anti-tracking agent and a metal-coated chopped yarn treated with an adhesion-improving agent to a silicone elastomer compound for coating insulated wires, comprising: a first step of preparing a heat-dissipating silicone elastomer compound; A second step of manufacturing an insulated wire by forming an insulating layer on the outer periphery of the conductor coated with the adhesion enhancer; A third step of forming a lightweight shielding layer by braiding metal fiber yarns on the outer periphery of the insulated wire; And a fourth step of forming a covering layer made of a heat dissipating silicone elastic body on the outer periphery of the lightweight shielding layer, and an insulating coated wire having improved heat dissipation, insulation, flame resistance, and light weight produced according to the method. will be.

Recently, various digital electronic devices, including smartphones and tablet PCs, are becoming necessities in our daily life. Recently, devices with various functions are called device convergence. There are many cases where they are integrated into one device.

This highly integrated technology inevitably generates heat that is the main cause of shortening the lifespan of electronic devices, performance degradation, and failure, so the need for heat dissipation technology that can effectively dissipate heat to the outside is increasing more and more, and future electronic devices As it is expected to become more compact and multifunctional, the necessity and importance of thermal management technology is expected to grow more and more.

The development of such electronic devices is fundamentally due to the development of high-integration technology for semiconductors (semi-conductor), but this high-integration technology inevitably generates heat, which is the main cause of degradation of electronic devices, shortening the lifespan and failure. Heat-sink technology, which can effectively discharge energy to the outside, is a big issue.

Therefore, since future electronic devices are expected to become lighter, thinner, and more multifunctional, the necessity and importance of developing heat dissipation technologies and materials are expected to grow more and more.

In particular, as the high performance of the vehicle is achieved, various automobile parts are replaced by electronic parts, and the heat problem gradually increases due to the miniaturization, ultra-thinness, and high density of electronic parts, and the demand for heat dissipation materials in each automobile field is on the rise.

Electric vehicles such as electric vehicles and hybrid vehicles are rapidly spreading due to the demand for low fuel consumption or reduction of carbon dioxide emissions, and there are prerequisite tasks such as building a charging infrastructure and overcoming the limit of mileage caused by battery performance and price. However, technologically, there is a growing recognition that electric vehicles are no longer future cars.

Electric vehicles use electricity as power, and the power sources are mainly composed of batteries, inverters, and motors.The motors are responsible for energy recovery during driving or deceleration of the vehicle. Higher output is required at the same time.

Electric vehicles are designed to supply a high voltage of up to 650V by mounting a boost circuit in the battery voltage of about 100 to 400 V, unlike an internal combustion engine vehicle that uses a 12 V storage battery.

Increasing the power of the electric motor requires an increase in the driving energy, but when the current is increased, the wire diameter of the copper wire needs to be thickened, resulting in a larger body size. On the other hand, an increase in the voltage can suppress the body size while increasing the power output. In the case of electric vehicles, the battery voltage is about 100 to 400V, and further, in some vehicles, a booster circuit is mounted to drive the motor with a high voltage of up to 650V.

Accordingly, the high voltage wiring harness system of an electric vehicle that provides such a high voltage is a high voltage high current harness system that supplies power from a battery to an electric motor, which is a main power source, and is composed of high voltage electronic shielding wires and connectors.

A motor is a device that converts electrical energy into mechanical energy, and generates thermal energy in the process of converting energy. This thermal energy acts as a major factor deteriorating electrical or mechanical performance. In particular, high voltage cables supplying electric energy to motors must be developed to exhibit stable performance in various operating and environmental conditions, and when power loss occurs, there is a need to thermally manage using an appropriate heat dissipation system.

The heat dissipation material is used not only in electronic devices, but also in automobiles and LEDs, and in the case of automobiles, the demand for electronic devices in the vehicle body and the amount of power used are rapidly increasing due to the trend of electronicization of automobile bodies worldwide. On the other hand, the electronic components used are light and small, and yet more reliable in function is required. Due to the high integration of electronic devices for automobiles and the increase in power consumption, the development of high-performance information technology-automobile fusion high heat dissipation material parts is in progress.

The heat dissipation material that is widely applied in the current industry is a composite material that is a mixture of a high thermal conductivity filler and a polymer material. The advantage of such a composite material is that it obtains excellent thermal conductivity performance and easy processability at the same time, but problems such as workability and physical properties of the polymer are deteriorated due to the inorganic filler that is added in large amounts to obtain high thermal conductivity. It will exist.

In addition, the general thermal conductivity of the polymer material is at the level of 0.2 W/mK, because the lattice vibration mode (phonon) is mostly scattered and not propagated by various defects in the polymer. Therefore, in order to realize a polymer composite with high thermal conductivity, the polymer chain composed of strong covalent bonds must be continuously connected without breaking through the heat conduction path.If these conditions are satisfied, the thermal conductivity of 100 W/mK equivalent to metal Is announced to be implemented.

In order to overcome this, a number of thermally conductive polymer composite materials have been developed, but they still have fundamental limitations such as low thermal conductivity or expensive manufacturing processes compared to inorganic fillers.

The present inventors, as a result of earnest research efforts, to discover a method for manufacturing a lightweight insulated coated wire having improved heat dissipation, insulation and flame resistance, exhibits inherent double-sided properties having both inorganic and organic properties, and excellent heat resistance, A heat-dissipating silicone elastomer compound prepared by introducing/mixing metal coated chopped yarn treated with a silane-treated tracking agent and an adhesion enhancer is avoided based on a silicone elastomer having advantageous properties such as chemical resistance, electrical insulation, abrasion resistance, weather resistance, and ozone resistance. It was confirmed that it was possible to manufacture using the dosage composition, and the present invention was completed.

A first aspect of the present invention is a composition for covering an insulating wire containing a heat dissipating silicone elastomer compound, wherein the heat dissipating silicone elastomer comprises a metal-coated chopped yarn treated with a silane surface-treated anti-tracking agent and an adhesion-improving agent on the silicone elastomer compound. It provides a composition for coating insulated wires.

A second aspect of the present invention is a method of manufacturing an insulating coated wire comprising a heat dissipating silicone elastomer compound, comprising: a first step of producing a heat dissipating silicone elastomer compound; A second step of manufacturing an insulated wire by forming an insulating layer on the outer periphery of the conductor coated with the adhesion enhancer; A third step of forming a lightweight shielding layer by braiding metal fiber yarns on the outer periphery of the insulated wire; And a fourth step of forming a covering layer made of a heat dissipating silicone elastic body on the outer periphery of the lightweight shielding layer.

A third aspect of the present invention is a conductor coated with an adhesion enhancer; Insulating layer; A lightweight shielding layer formed by braiding a metal fiber yarn coated with an adhesion enhancer; And a coating layer made of a heat dissipating silicone elastomer compound. Insulated coated wires that are included in order are provided.

A first aspect of the present invention is a composition for covering an insulating wire containing a heat dissipating silicone elastomer compound, wherein the heat dissipating silicone elastomer comprises a metal-coated chopped yarn treated with a silane surface-treated anti-tracking agent and an adhesion-improving agent on the silicone elastomer compound. It provides a composition for coating insulated wires.

The composition for coating an insulated wire is to improve heat dissipation characteristics, insulation, flame resistance, and light weight by mixing a heat dissipating silicone elastomer compound.

The term'coating' in the present invention means the use of wrapping the outer surface of each component layer of an electric wire.

The'silicone elastomer' of the present invention has very excellent heat resistance, chemical stability, electrical insulation, abrasion resistance, weather resistance, ozone resistance, etc. compared to general organic rubber because of its inorganic properties due to siloxane bond (Si-O), which is a main chain in molecular structure. It has a characteristic.

The'heat-dissipating silicone elastic body' of the present invention is obtained by adding a heat dissipating agent to the silicone elastic body, and has a heat-resistance and insulation function, as well as a heat dissipation function, thereby improving stability. Specifically, it may include a silane surface-treated anti-tracking agent and an adhesion-improving agent-treated metal-coated chopped yarn, but is not limited thereto.

In the'silane surface-treated anti-tracking agent', the anti-tracking agent is a material that improves the ability of the insulating material to withstand damage due to the formation of a conduction path under high voltage. Can be improved.

The anti-tracking agent includes a metal oxide-type anti-tracking agent and a hydroxide-type anti-tracking agent. In this case, the particle diameter of the anti-tracking agent may be 10 to 50 μm, but is not limited thereto.

Metal oxide type tracking agent is used to improve the withstand voltage characteristics of insulating composites, and magnesium oxide, aluminum oxide, titanium dioxide, vanadium pentoxide, chromium (III) Oxide (chromium (III) oxide), iron (III) oxide (iron (III) oxide), nickel oxide (nickel oxide), molybdenum oxide (molybdenum trioxide), tungsten oxide (tungsten trioxide) is used alone or in combination. It is not limited thereto. In this case, when the amount of the metal oxide-type tracking agent is less than 40 parts by weight based on 100 parts by weight of the solvent, economical efficiency is deteriorated, and when it is added in excess of 80 parts by weight, the interfacial adhesion is inferior.

Hydroxide type tracking agent is used to improve the withstand voltage characteristics of insulating composites. Iron hydroxide, calcium hydroxide, magnesium hydroxide, aluminum hydroxide ) Or the like may be used alone or in combination, but is not limited thereto. At this time, in this case, when the amount of the hydroxide-type tracking agent is less than 20 parts by weight based on 100 parts by weight of the solvent, economical efficiency is deteriorated, and when it is added in excess of 60 parts by weight, interfacial adhesion is deteriorated.

The silane group is vinyl tris 2-methoxyethoxy silane, tris (isopropoxy) vinyl silane [tri(isopropoxy)vinylsilane], acryloxy 3-methacryloxypropyl-trimethoxy silane (acryloxy 3-metacryloxypropyl-trimethoxy silane), ß-(3,4-epoxycyclohexyl)-ethyltrimethoxysilane (ß-(3,4 -epoxycyclohexyl)-ethyltrimethoxysilane), 3-aminopropyl-triethoxy silane (3-aminopropyl-triethoxy silane) gamma-ureidopropyltrimethoxysilane, gamma-ureidopropyltriethoxysilane, 3-aminopropyltrimethoxysilane ), 3-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane or gamma-glycidoxypropyltriethoxysilane, etc. To be used in combination, but is not limited thereto. At this time, when the concentration of the silane is less than 1% by weight of the solvent, the interfacial adhesion between the tracking agent and the silicone elastomer is poor, and when the concentration of the silane is 2% by weight or more, the economical efficiency is poor.

The'adhesion improving agent-treated metal-coated chopped yarn' of the present invention means that the metal fiber yarn coated with the adhesion-improving agent is cut with a chopping machine equipped with a cutting blade cutter.

Another aspect of the present invention is a method of manufacturing an insulating coated wire comprising a heat dissipating silicone elastomer compound, comprising: a first step of producing a heat dissipating silicone elastomer compound; A second step of manufacturing an insulated wire by forming an insulating layer on the outer periphery of the conductor coated with the adhesion enhancer; A third step of forming a lightweight shielding layer by braiding metal fiber yarns on the outer periphery of the insulated wire; And a fourth step of forming a covering layer made of a heat dissipating silicone elastic body on the outer periphery of the lightweight shielding layer.

The'first step' of the present invention includes: i) preparing a chopped yarn of metal fiber yarn surface-treated with a reactive silane; And ii) adding and blending the surface-treated chopped yarn obtained from step i), the silane surface-treated anti-tracking agent, and a heat dissipating agent into the silicone elastomer compound, but is not limited thereto.

I) of the first step includes: a) preparing an adhesion improving agent; b) preparing a metal fiber yarn coated with an adhesion enhancer; And c) manufacturing a metal fiber chopped yarn coated with an adhesion enhancer using a chopping machine equipped with a cutter having a cutting edge interval of 0.5 to 6 mm. Not limited.

The cutting blade spacing may be 0.5 to 6 mm, and more specifically 0.5 to 3 mm. In this case, if the cutting blade spacing is less than 0.5 mm, the cutting workability of the long fiber yarn is deteriorated, and when the distance of the cutting edge is more than 6 mm, the blendability of the cut chopped yarn with the silicone elastomer is inferior.

More specifically, i) of the first step is as follows.

100 to 200 parts by weight of triazinethiol propenyl dimethylpolysiloxane or triazinethiol butenyl dimethylpolysiloxane based on 100 parts by weight of a solvent in an impregnation tank equipped with a stirrer and a temperature controller dimethylpolysiloxane) and stirring at a speed of 10 to 200 RPM to prepare an adhesion enhancer;

The metal-coated fiber yarn is passed through an impregnation vessel containing the adhesion improving agent prepared in the manufacturing step of the adhesion improving agent maintained at a temperature of 20 to 30°C at a speed of 1 to 100 m/min, and then at a temperature of 60 to 100°C. An adhesion-improving agent coating step of passing through a drying furnace maintained as an adhesion-improving agent-coated metal-coated fiber yarn;

Metallic coating coated with adhesion enhancer by cutting the metal fiber yarn coated with the adhesion enhancer prepared in the adhesion enhancer coating step using a chopping machine equipped with a cutter with a cutting blade spacing of 0.5 to 6 mm It can be carried out in the chopp yarn manufacturing step of manufacturing the fiber chopped yarn, but is not limited thereto.

Specifically, ii) of the first step is as follows.

Based on 100 parts by weight of a solvent, 1 to 2 parts by weight of silane is added to the reactor, stirred for 30 to 120 minutes at a rate of 100 to 500 RPM, and then a hydroxide type anti-tracking agent ( anti-tracking agent) 20 to 60 parts by weight is administered, and 100 parts by weight of solvent and 1 to 2 parts by weight of silane are added to a separate reactor equipped with a temperature controller and agitator for 30 to 120 minutes at a rate of 100 to 500 RPM. After stirring, 40 to 80 parts by weight of a metal oxide type anti-tracking agent were added, stirred for 30 to 120 minutes at a speed of 100 to 1,000 RPM, and filtered at a temperature of 40 to 80°C. A silane treatment step of an anti-tracking agent to prepare an anti-tracking agent subjected to a silane surface treatment by drying;

12 to 20 parts by weight of hydrogen siloxane copolymers, 30 to 120 parts by weight based on 100 parts by weight of vinyl-terminated poly(methylvinyl)siloxane in a mixing mixer Mixing by administering and mixing parts by weight of reinforcement silica, 0.005 to 0.15 parts by weight of a polymerization catalyst, and 0.01 to 0.15 parts by weight of a crosslinking retardant, and mixing by heating at 140 to 180°C, A silicon elastomer compound manufacturing step of producing a silicon elastomer compound through a nitrogen purge and a cooling process;

100 parts by weight of the silicone elastomer compound prepared in the silicon elastomer compound manufacturing step, 0.1 to 50 parts by weight of the metal-coated fiber chopped yarn prepared in the chopp manufacturing step, 0.1 to 100 parts by weight of the silane surface prepared in the silane treatment step of the anti-tracking agent The treated anti-tracking agent, 0.1 to 200 parts by weight of a heat dissipating agent, 0.05 to 2 parts by weight of a pigment, and 0.05 to 1 part by weight of a processing aid may be sequentially administered and blended to prepare a heat dissipating silicone elastomer compound, but is not limited thereto. Does not.

For example, the heat dissipating agent may be at least one selected from the group consisting of silicon carbide, aluminum nitride, boron nitride, and the like, and may be 0.1 to 200 parts by weight. If the heat dissipating agent is less than 0.1 parts by weight, the heat dissipation characteristics are deteriorated, and if it is added in excess of 200 parts by weight, the physical properties of the heat dissipating compound are deteriorated and economical efficiency is deteriorated.

The step of manufacturing an insulated wire by forming an insulating layer on the outer periphery of a conductor coated with the'second step' adhesion enhancer of the present invention is specifically as follows.

A conductor made of a single metal, an alloy, or a metal is passed through an impregnation tank containing the adhesion improving agent manufactured in the manufacturing step of the adhesion improving agent maintained at a temperature of 20 to 30°C at a speed of 1 to 100 m/min, and then 60 to 100°C A conductor coating step of producing a conductor coated with an adhesion enhancer by passing through a drying furnace maintained at a temperature of;

While supplying the prepared heat dissipation silicone elastomer compound to a rubber injector mounted on a rubber extruder, the conductor coated with the adhesion enhancer manufactured in the conductor coating step is fed at a speed of 1 to 100 m/min through a rubber extruder head equipped with an extrusion die. It may be performed, including, but not limited to, an insulating layer forming step of forming an insulating layer on the outer periphery of the conductor coated with the adhesion improving agent by extrusion coating while passing through, but is not limited thereto.

The'third step' of the present invention includes: i) crosslinking the insulated wire formed in the second step; And ii) braiding a metal fiber yarn coated with an adhesion enhancer on the outer periphery of the crosslinked insulated wire, but is not limited thereto.

More specifically, the insulating layer is crosslinked while passing through a crosslinking line in which a heater box is mounted and the temperature is maintained at 300°C to 500°C. An insulating layer crosslinking step of crosslinking to form an insulating wire;

A lightweight shielding layer forming step of fabricating an insulated wire with a lightweight shielding layer by braiding a metal fiber yarn coated with an adhesion improving agent produced in the adhesion-improving agent coating step on the outer periphery of the insulated wire manufactured in the insulating layer crosslinking step with a conventional braiding machine It can be performed including, but is not limited thereto.

In the'fourth step' of the present invention, the heat-dissipating silicone elastomer compound prepared in the heat-radiating silicone elastomer compound mixing step is supplied to the rubber injector mounted on the rubber extruder, and the insulated wire having the light-weight shielding layer prepared in the light-weight shielding layer forming step is provided. A coating layer forming step of forming a heat-dissipating silicone elastomer coating layer on the insulating outer periphery on which a lightweight shielding layer is formed by extrusion coating at a speed of 1 to 50 m/min through a rubber extruder head equipped with an extrusion die;

Including the step of crosslinking the insulating wire with the covering layer prepared in the covering layer forming step while passing through a crosslinking line equipped with a heater box and maintained at a temperature of 300°C to 500°C to form a silicone heat dissipating insulating wire crosslinking the covering layer. It can be performed, but is not limited thereto.

Another aspect of the present invention is a conductor coated with an adhesion enhancer; Insulating layer; A lightweight shielding layer formed by braiding a metal fiber yarn coated with an adhesion enhancer; And a coating layer made of a heat dissipating silicone elastomer compound. Insulated coated wires that are included in order are provided.

The'heat-dissipating silicone elastomer compound' may be included not only in the coating layer but also in the insulating layer.

The'adhesion enhancer' may be formed by adding triazinethiol propenyl dimethylpolysiloxane or triazinethiol butenyl dimethylpolysiloxane, but is not limited thereto.

The metal fiber yarn is a metal coated fiber yarn, and may have a metal coating thickness of 0.01 to 10 μm. At this time, when the thickness of the metal coating is less than 0.01 μm, heat dissipation is poor, and when the thickness of the metal coating exceeds 10 μm, the light weight is poor.

Specifically, the metal fiber yarn may have 50 to 3000 filaments, and each filament may have a diameter of 1 to 40 μm. At this time, if the number of filaments is less than 50, the economic feasibility decreases, and if the number of filaments is more than 3,000, the workability due to damage to the cutting blade is deteriorated. At this time, if the filament diameter is less than 1 μm, reinforcement of the cut chopp's polymer resin and elastomer is poor, and if the filament diameter is 40 μm or more, the blendability of the cut chopp's polymer resin or elastomer is inferior.

The metal of the metal fiber yarn may be one or more selected from the group consisting of nickel, copper, silver, gold, iron, and tin, but is not limited thereto.

The fiber yarn may be one or more selected from the group consisting of carbon fiber, glass fiber, alumina fiber and ceramic fiber, aramid fiber, and carbon nanofiber. Specifically, it may be carbon fiber, glass fiber, alumina fiber, or ceramic fiber, but is not limited thereto.

The insulated coated wire according to the present invention may be a wire for an electric vehicle, but is not limited thereto.

Electric vehicle wiring requires a high-voltage wiring harness system consisting of high-voltage electronic shielding wires and connectors, and a heat dissipation system to block performance degradation due to heat generated in converting electrical energy into mechanical energy in a motor. The insulating coated wire of the present invention with improved breakdown voltage can be used as a wire for an electric vehicle.

By applying a heat dissipating silicone elastomer including a silane surface-treated anti-tracking agent and a metal-coated chopped yarn treated with an adhesion-improving agent to a silicone elastomer compound, it was confirmed that dispersibility, tensile strength, thermal conductivity, and dielectric breakdown voltage were improved. It is possible to provide a lightweight insulated coated wire, and it can be usefully used as it can meet the demand for small light weight and high heat dissipation wires in the industry due to the recent high integration of electric devices and increased power consumption.

1 is a flow chart of a method of manufacturing a heat-dissipating silicon elastic body insulating coated wire having a lightweight shielding layer according to an embodiment of the present invention.
2 is a photomicrograph of Example 1 and Comparative Example 1. FIG.
3 is an electron micrograph of Chop Corporation of Example 1 and Comparative Example 1. FIG.

Hereinafter, the present invention will be described in more detail through examples. These examples are for explaining the present invention more specifically, and the scope of the present invention is not limited by these examples.

Example 1.

1.1 Preparation of heat dissipating silicone elastomer compound

To a reactor equipped with a temperature controller and a stirrer, 2,000 parts by weight of ethanol and 3-aminopropyltrimethoxysilane were added, stirred for 30 minutes at a speed of 300 RPM, and then 500 g of aluminum hydroxide was added and at a temperature of 20°C. After stirring for 30 minutes, filtered, washed while spraying 200 g of ethanol, and dried in a vacuum oven maintained at 60° C. for 6 hours to prepare an aluminum hydroxide anti-tracking agent treated with 3-aminopropyltrimethoxysilane. I did.

To a reactor equipped with a temperature controller and a stirrer, 2,000 parts by weight of ethanol and 3-aminopropyltrimethoxysilane were added, stirred for 30 minutes at a speed of 300 RPM, and then 800 g of molybdenum oxide was added and stirred for 30 minutes at a temperature of 20°C. Then, it was filtered, washed while spraying 200 g of ethanol, and dried in a vacuum oven maintained at 60° C. for 6 hours to prepare a molybdenum oxide anti-tracking agent treated with 3-aminopropyltrimethoxysilane.

An adhesion improving agent was prepared by adding 500 g of ethanol and 500 g of triazinethiol propenyl dimethylpolysiloxane to an impregnation tank equipped with a stirrer and a temperature controller, and stirring at a speed of 100 RPM.

The metal-coated fiber yarn is passed through an impregnation vessel containing the adhesion improving agent prepared in the manufacturing step of the adhesion improving agent maintained at a temperature of 20 to 30°C at a speed of 1 to 100 m/min, and then at a temperature of 60 to 100°C. An adhesion-improving agent coating step of passing through a drying furnace maintained as an adhesion-improving agent-coated metal-coated fiber yarn;

Pass through a copper-coated carbon fiber yarn with a filament diameter of 20 μm and a number of filaments of 800 at a speed of 5 m/min through an impregnation tank containing an adhesion improving agent maintained at 25°C, and then through a drying furnace maintained at a temperature of 100°C. Then, a copper-coated carbon fiber yarn surface-treated with triazinethiol propenyl dimethylpolysiloxane was prepared.

Chopped yarn was prepared by cutting the copper-coated carbon fiber yarn surface-treated with triazinethiol propenyl dimethylpolysiloxane using a chopping machine equipped with a cutter having a cutting edge spacing of 1 mm.

In a change can mixer, a viscosity of 4,250 g is 450,000 centipoise, a vinyl terminated poly(methylvinyl) siloxane with a vinyl content of 1 mmol/part by weight, and 750 g of a viscosity of 80 centipoise, a hydrogen group content. 1.5 mmol/part by weight of hydrogen siloxane polymer, 4,999 g of reinforcing silica, 0.25 g of polymerization catalyst, 0.75 g of 1-ethynyl-1-cyclohexanol (curing retardant) were added, mixed, and heated at 160°C. A silicone elastomer compound was prepared through kneading, nitrogen purge, and cooling processes.

In a mill mixer, 10,000 g of silicon elastomer compound, 2,000 g of copper-coated Chop yarn, 10,000 g of silane surface-treated anti-tracking agent (aluminum hydroxide and molybdenum oxide are mixed 1:1), 10,000 g parts by weight of heat dissipation agent , 20 g of a pigment and 30 g of a processing aid were sequentially administered to prepare a heat dissipating silicone elastomer compound.

1.2 Insulation layer formation

Triazinethiol propenyl dimethyl by passing a conductor composed of copper with an outer diameter of 5 mm through an impregnation tank containing an adhesion improving agent maintained at a temperature of 25°C at a speed of 5 m/min, and then passing through a drying furnace maintained at a temperature of 100°C. A copper conductor surface-treated with polysiloxane was prepared.

Extrusion coating while supplying the heat dissipating silicone elastomer compound to the rubber injector mounted on the rubber extruder while passing the copper conductor surface-treated with triazinethiol propenyl dimethylpolysiloxane through a rubber extruder head equipped with an extrusion die at a speed of 5 m/min. Thus, an insulating layer was formed.

Insulated wires were prepared when the insulating layer was crosslinked by crosslinking the conductor with the insulating layer formed thereon while passing through a crosslinking line in which a heater box was mounted and the temperature was maintained at 450°C.

1.3 Lightweight shielding layer formation

A lightweight shielding layer was formed by braiding a copper-coated carbon fiber yarn surface-treated with triazinethiol propenyl dimethylpolysiloxane on the outer periphery of the prepared insulated wire with a 24 pendulum braid.

1.4 Coating layer formation

The heat-radiating silicone elastomer compound was supplied to the rubber injector mounted on the rubber extruder, and the insulated wire on which the lightweight shielding layer was formed was passed through the rubber extruder head equipped with the extrusion die at a speed of 5 m/min, and the coating layer was formed by extrusion coating.

The insulated wire on which the coating layer was formed was cross-linked while passing through a cross-linking line in which the heater box was mounted and the temperature was maintained at 450° C., thereby completing the manufacture of a heat-dissipating silicone elastomer insulated-coated wire for an electric vehicle having a lightweight shielding layer.

Comparative Example 1.

1.1 Preparation of heat dissipating silicone elastomer compound

It was prepared in the same manner as in Example 1.1, except for the copper-coated chopped yarn.

1.2 Insulation layer formation

The rest were prepared in the same manner as in Example 1.2, except for triazinethiol propenyl dimethylpolysiloxane, which is an adhesion improving agent.

1.3 Lightweight shielding layer formation

It was prepared in the same manner as in Example 1.3, except that a tin-plated wire was used instead of the copper-coated carbon fiber yarn surface-treated with triazinethiol propenyl dimethylpolysiloxane.

1.4 Coating layer formation

It was prepared in the same manner as in Example 1.4 using the heat dissipating silicone elastomer compound prepared in Comparative Example 1.1.

Test Example: Measurement of dispersibility, tensile strength, thermal conductivity, and dielectric breakdown voltage

The tensile strength of the insulation or coating of the thus prepared specimen was measured at a rate of 200 mm/min using a universal testing machine after manufacturing a dumb-bell specimen of IEC 60811-1-1 standard. flash analyzer, LFA) was used to measure a specimen having a thickness of 0.1 to 0.4 mm.

Example Dispersibility Tensile strength (MPa) Thermal conductivity (W/mK) Insulation breakdown voltage (KV) One Great 4.0 0.34 22 Comparative example Dispersibility Tensile strength (MPa) Thermal conductivity (W/mK) Insulation breakdown voltage (KV) One Bad 2.5 0.15 18

As shown in Table 1, it can be seen that Example 1 has improved withstand voltage, tensile properties, and thermal conductivity than Comparative Example 1. That is, whether or not metal fiber yarn chopped yarn is applied to the coating layer; Whether or not an adhesion enhancer is applied to the insulating layer; And it was found that the effect difference according to the presence or absence of the application of the adhesion enhancer-coated metal fiber yarn on the lightweight shielding layer.

In addition, as shown in Figure 2, it was confirmed that Example 1 improved the dispersibility of the chopped yarn without agglomeration than Comparative Example 1, and unlike Comparative Example 1, as in FIG. 3, silane was present on the metal-coated surface of Example 1 It was confirmed that it was applied evenly.

Claims (17)

A composition for covering insulated wires containing a heat dissipating silicone elastomer compound,
The heat dissipating silicone elastomer is a composition for coating an insulating wire comprising a metal-coated chopped yarn treated with a silane surface-treated anti-tracking agent and an adhesion-improving agent in a silicone elastomer compound. The method of claim 1,
The coating composition is characterized in that the heat dissipation, insulation, flame resistance and light weight are improved. The method of claim 1,
The silane surface-treated anti-tracking agent is a composition comprising 40 to 80 parts by weight of a metal oxide based on 100 parts by weight of a solvent. The method of claim 3,
The silane surface-treated anti-tracking agent composition further comprises 20 to 60 parts by weight of a hydroxide based on 100 parts by weight of the solvent. As a method of manufacturing an insulating coated wire comprising a heat dissipating silicone elastomer compound,
A first step of manufacturing a heat dissipating silicone elastomer compound; A second step of manufacturing an insulated wire by forming an insulating layer on the outer periphery of the conductor coated with the adhesion enhancer; A third step of forming a lightweight shielding layer by braiding metal fiber yarns on the outer periphery of the insulated wire; And a fourth step of forming a covering layer made of a heat dissipating silicone elastic body on the outer periphery of the lightweight shielding layer. The method of claim 5,
The first step includes: i) preparing a chopped yarn of metal fiber yarn surface-treated with a reactive silane; And ii) adding and blending the surface-treated chopped yarn obtained from step i) into the silicone elastomer compound, the silane surface-treated anti-tracking agent, and the heat dissipating agent. The method of claim 6,
The step i) comprises the steps of: a) preparing an adhesion improving agent; b) preparing a metal fiber yarn coated with an adhesion enhancer; And c) manufacturing a metal fiber chopped yarn coated with an adhesion enhancer using a chopping machine equipped with a cutter having a cutting blade spacing of 0.5 to 6 mm. The method of claim 6,
The method of manufacturing that the heat dissipating agent comprises 0.1 to 200 parts by weight based on 100 parts by weight of the silicone elastomer compound. The method of claim 5,
The third step includes: i) crosslinking the insulated wire formed in the second step; And ii) braiding a metal fiber yarn coated with an adhesion enhancer on the outer periphery of the crosslinked insulated wire. Adhesion-enhancing agent-coated conductor; Insulating layer; A lightweight shielding layer formed by braiding a metal fiber yarn coated with an adhesion enhancer; And a coating layer made of a heat dissipating silicone elastomer compound. Insulated coated wires that are included in order. The method of claim 10,
Insulated coated wire further comprising a heat dissipating silicone elastomer compound in the insulating layer. The method of claim 10,
The adhesion enhancing agent is formed by adding triazinethiol propenyl dimethylpolysiloxane or triazinethiol butenyl dimethylpolysiloxane. The method of claim 10,
The metallic fiber yarn is a metallic-coated fiber yarn, wherein the metallic coating thickness is 0.01 to 10 μm. The method of claim 13,
The metal is at least one selected from the group consisting of nickel, copper, silver, gold, iron, and tin. The method of claim 13
The insulating coated wire is one or more selected from the group consisting of carbon fibers, glass fibers, alumina fibers and ceramic fibers, aramid fibers and carbon nanofibers. The method of claim 10,
The metallic fiber yarn has 50 to 3000 filaments and each filament has a diameter of 1 to 40 μm. The method of claim 10,
The insulated coated wire is an insulated coated wire for an electric vehicle.

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